head to head · open source
monaco-editor vs extism
monaco-editor has 46,944 GitHub stars, 4,167 forks, 859 open issues and last shipped yesterday. extism has 5,823 stars, 167 forks, 54 open issues and last shipped 25 days ago. monaco-editor leads on adoption by 706% (46,944 vs 5,823 stars). monaco-editor is written in JavaScript under MIT; extism is written in Rust under BSD-3-Clause. monaco-editor has attracted 9% as many forks as stars, extism 3%. monaco-editor was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (browser), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| monaco-editor | extism | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 5.8K |
| License | MIT | BSD-3-Clause |
| Written in | JavaScript | Rust |
| Last push | 2026-11-02 | 2026-10-09 |
| Forks | ⑂ 4.2K | ⑂ 167 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick monaco-editor if
- You weight community size — 47K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick extism if
- You want the extism feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches Rust
- You evaluated both and extism fits your workflow better
About monaco-editor
Monaco Editor The Monaco Editor is the fully featured code editor from VS Code. Check out the VS Code docs to see some of the supported features. Try it out Try out the editor and see various examples in our interactive playground. The playground is the best way to learn about how to use the editor, which features is supports, to try out different versions and to create minimal reproducible examples for bug reports. Installing You will get: inside /esm : ESM version of the editor (compatible with e.g. webpack) monaco.d.ts : this specifies the API of the editor (this is what is actually versioned, everything else…
read the full monaco-editor overview →
About extism
Overview Extism is a lightweight framework for building with WebAssembly (Wasm). It supports running Wasm code on servers, the edge, CLIs, IoT, browsers and everything in between. Extism is designed to be "universal" in that it supports a common interface, no matter where it runs. Note: One of the primary use cases for Extism is building extensible software & plugins . You want to be able to execute arbitrary, untrusted code from your users? Extism makes this safe and practical to do. Additionally, Extism adds some extra utilities on top of standard Wasm runtimes. For example, we support persistent memory/module…
read the full extism overview →
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Frequently asked questions
Is monaco-editor or extism more popular?
monaco-editor has 46,944 GitHub stars and extism has 5,823. monaco-editor has the larger community by that measure.
Are monaco-editor and extism free?
Both are open source. monaco-editor is licensed under MIT and extism under BSD-3-Clause. Neither carries a licence fee.
What is the difference between monaco-editor and extism?
monaco-editor is written in JavaScript and extism in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, monaco-editor or extism?
Choose monaco-editor if you want the larger community (46,944 stars) or its MIT licence terms. Choose extism if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.